chore: backport zetaclient v19.1.0 changes

[gartnera]

Prepare for zetaclient v19.1.0 release. This PR should be merged rather than squash merged.

TODO:

• feat: Solana relayer (fee payer) key importer, encryption and decryption #2673
• ci: Set Docker Workflow to use Go 1.22 #2722
• fix: Refactor contrib/rpc and contrib/docker-scripts to use snapshots API #2724

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[codecov]

Codecov Report

Attention: Patch coverage is 61.17990% with 533 lines in your changes missing coverage. Please review.

Project coverage is 47.19%. Comparing base (43a78ef) to head (8ce7de1).
Report is 1 commits behind head on release/v19.

Files	Patch %	Lines
zetaclient/orchestrator/bootstrap.go	49.38%	63 Missing and 19 partials ⚠️
zetaclient/chains/evm/observer/outbound.go	0.00%	66 Missing ⚠️
zetaclient/chains/evm/signer/signer.go	65.17%	34 Missing and 5 partials ⚠️
zetaclient/orchestrator/orchestrator.go	50.66%	37 Missing ⚠️
zetaclient/chains/evm/observer/inbound.go	10.25%	33 Missing and 2 partials ⚠️
zetaclient/context/app.go	70.19%	25 Missing and 6 partials ⚠️
zetaclient/chains/bitcoin/observer/witness.go	70.78%	17 Missing and 9 partials ⚠️
...ent/chains/evm/signer/outbound_tracker_reporter.go	34.28%	20 Missing and 3 partials ⚠️
zetaclient/context/chain.go	76.82%	19 Missing ⚠️
zetaclient/chains/evm/rpc/rpc.go	0.00%	18 Missing ⚠️
... and 33 more

Additional details and impacted files

@@               Coverage Diff               @@
##           release/v19    #2721      +/-   ##
===============================================
+ Coverage        46.24%   47.19%   +0.94%     
===============================================
  Files              473      482       +9     
  Lines            31455    31585     +130     
===============================================
+ Hits             14546    14905     +359     
+ Misses           16060    15792     -268     
- Partials           849      888      +39     

Files	Coverage Δ
e2e/config/config.go	27.74% <ø> (ø)
e2e/utils/zetacore.go	0.00% <ø> (ø)
pkg/crypto/privkey.go	100.00% <100.00%> (ø)
zetaclient/chains/base/observer.go	84.78% <100.00%> (ø)
zetaclient/chains/base/signer.go	95.74% <100.00%> (+0.29%)	⬆️
zetaclient/chains/bitcoin/observer/observer.go	33.22% <ø> (+2.85%)	⬆️
zetaclient/chains/evm/observer/observer.go	60.34% <ø> (+9.39%)	⬆️
zetaclient/chains/evm/observer/observer_gas.go	39.47% <100.00%> (ø)
e2e/e2etests/test_eth_deposit.go	0.00% <0.00%> (ø)
e2e/e2etests/test_migrate_chain_support.go	0.00% <0.00%> (ø)
... and 41 more

... and 2 files with indirect coverage changes

[gitguardian]

⚠️ GitGuardian has uncovered 3 secrets following the scan of your pull request.

Please consider investigating the findings and remediating the incidents. Failure to do so may lead to compromising the associated services or software components.

🔎 Detected hardcoded secrets in your pull request

GitGuardian id	GitGuardian status	Secret	Commit	Filename
13340122	Triggered	Generic High Entropy Secret	d4780ff	zetaclient/chains/solana/signer/signer_test.go	View secret
13340122	Triggered	Generic High Entropy Secret	d4780ff	zetaclient/chains/solana/signer/signer_test.go	View secret
13392123	Triggered	Generic High Entropy Secret	d4780ff	zetaclient/chains/solana/signer/signer_test.go	View secret

🛠 Guidelines to remediate hardcoded secrets

1. Understand the implications of revoking this secret by investigating where it is used in your code.
2. Replace and store your secret safely. Learn here the best practices.
3. Revoke and rotate this secret.
4. If possible, rewrite git history. Rewriting git history is not a trivial act. You might completely break other contributing developers' workflow and you risk accidentally deleting legitimate data.

To avoid such incidents in the future consider

• following these best practices for managing and storing secrets including API keys and other credentials
• install secret detection on pre-commit to catch secret before it leaves your machine and ease remediation.

---

^{🦉 GitGuardian detects secrets in your source code to help developers and security teams secure the modern development process. You are seeing this because you or someone else with access to this repository has authorized GitGuardian to scan your pull request.}

[github-actions]

!!!WARNING!!!
nosec detected in the following files: zetaclient/keys/relayer_key.go

Be very careful about using #nosec in code. It can be a quick way to suppress security warnings and move forward with development, it should be employed with caution. Suppressing warnings with #nosec can hide potentially serious vulnerabilities. Only use #nosec when you're absolutely certain that the security issue is either a false positive or has been mitigated in another way.

Only suppress a single rule (or a specific set of rules) within a section of code, while continuing to scan for other problems. To do this, you can list the rule(s) to be suppressed within the #nosec annotation, e.g: /* #nosec G401 */ or //#nosec G201 G202 G203
Broad #nosec annotations should be avoided, as they can hide other vulnerabilities. The CI will block you from merging this PR until you remove #nosec annotations that do not target specific rules.

Pay extra attention to the way #nosec is being used in the files listed above.

[ws4charlie]

zetaclient-only patches, looks good