Functions support zksync

[mohamed-mehany]

INTAUTO-272

This PR extends the existing Functions contracts to support ZKSync.

Changes

• The contracts (FunctionsBilling and FunctionsCoordinator) had to be modified in order to support ZKSync due to the ChainSpecificUtil library containing an opcode ZKSync did not support.
• Added a safe (limited return data size) implementation for CalWithExactGas based on zkSync's GasBoundCaller contract.
• Added ZKSyncFunctionsRouter contract implementation inheriting from the main FunctionsRouter contract.
• [WIP] Unit testing for the new logic.

Requires

[github-actions]

Static analysis results are available

Hey @mohamed-mehany, you can view Slither reports in the job summary here or download them as artifact here.
Please check them before merging and make sure you have addressed all issues.

[cl-sonarqube-production]

Quality Gate passed

Issues
0 New issues
0 Fixed issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarQube

[github-actions]

AER Report: CI Core

aer_workflow , commit , Clean Go Tidy & Generate , Detect Changes , Scheduled Run Frequency , GolangCI Lint (.) , Core Tests (go_core_tests) , Core Tests (go_core_tests_integration) , Core Tests (go_core_ccip_deployment_tests) , Core Tests (go_core_fuzz) , Core Tests (go_core_race_tests) , test-scripts , lint , SonarQube Scan

1. TestDeployLinkToken failed:go_core_ccip_deployment_tests

Source of Error:

--- FAIL: TestDeployLinkToken (42.04s)
chain.go:97: 
	Error Trace:	/home/runner/work/chainlink/chainlink/deployment/environment/memory/chain.go:173
	 				/home/runner/work/chainlink/chainlink/deployment/environment/memory/chain.go:97
	 				/home/runner/work/chainlink/chainlink/deployment/environment/memory/environment.go:68
	 				/home/runner/work/chainlink/chainlink/deployment/environment/memory/environment.go:195
	 				/home/runner/work/chainlink/chainlink/deployment/common/changeset/deploy_link_token_test.go:17
	Error: 	Received unexpected error:
	 	start container: started hook: wait until ready: context deadline exceeded
	Test: 	TestDeployLinkToken

Why: The error indicates that the TestDeployLinkToken test failed because the container did not start within the expected time frame, leading to a context deadline exceeded error.

Suggested fix: Increase the timeout duration for the container startup in the test configuration or optimize the container initialization process to ensure it starts within the given time frame.