feat(zetaclient)!: add support for TON withdrawals

[swift1337]

Changes

• TON signer
• watchOutbound
• watchGasPrice
• TBD...

Prerequisites

• Refactor to support feat(gateway)!: implement foundational logic for gas fees protocol-contracts-ton#17
• Fix Deposit E2E test cases
• Move some gateway-related code from e2e runner to pkg/contracts/ton

Closes #2807
Closes #2809

[github-actions]

!!!WARNING!!!
nosec detected in the following files: pkg/contracts/ton/coin.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.

[codecov]

Codecov Report

Attention: Patch coverage is 42.25352% with 41 lines in your changes missing coverage. Please review.

Project coverage is 64.81%. Comparing base (ae6ab23) to head (109b8f4).
Report is 6 commits behind head on develop.

Files with missing lines	Patch %	Lines
pkg/contracts/ton/gateway.go	17.24%	23 Missing and 1 partial ⚠️
pkg/contracts/ton/gateway_deploy.go	60.97%	10 Missing and 6 partials ⚠️
pkg/contracts/ton/coin.go	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #3020      +/-   ##
===========================================
- Coverage    65.77%   64.81%   -0.96%     
===========================================
  Files          398      410      +12     
  Lines        22421    28479    +6058     
===========================================
+ Hits         14747    18459    +3712     
- Misses        6900     9218    +2318     
- Partials       774      802      +28     

Files with missing lines	Coverage Δ
pkg/contracts/ton/coin.go	0.00% <0.00%> (ø)
pkg/contracts/ton/gateway_deploy.go	60.97% <60.97%> (ø)
pkg/contracts/ton/gateway.go	45.71% <17.24%> (-15.27%)	⬇️

... and 391 files with indirect coverage changes