fix: support new substrate-contracts-node structure and stabilize integration tests

[AlexD10S]

This PR introduces various fixes:

1- The latest release of substrate-contracts-node https://github.com/paritytech/substrate-contracts-node/releases/tag/v0.42.0 introduced a new directory structure for binary extraction. This change caused pop-cli to fail when attempting to use the latest version. The logic has been updated to support both the old structure and the new structure.

2- The CI has been failing in the integration test launch_paseo_and_system_parachain due to issues with version compatibility. The test now explicitly sets the version of Paseo to v1.3.3 where coretime-paseo-local was introduced.

3- Updated CI to trigger on events like opened, synchronize, reopened, and ready_for_review, instead of only for PRs targeting main.

4- The function run_contracts_node has been updated to allow specifying the port for running the substrate-contracts-node. This improvement facilitates running unit tests in parallel without port conflicts

[codecov]

Codecov Report

Attention: Patch coverage is 50.00000% with 27 lines in your changes missing coverage. Please review.

Project coverage is 72.59%. Comparing base (258a4b2) to head (0f1605e).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/pop-contracts/src/node/mod.rs	50.00%	7 Missing and 2 partials ⚠️
crates/pop-contracts/src/call.rs	40.00%	0 Missing and 6 partials ⚠️
crates/pop-contracts/src/up.rs	50.00%	0 Missing and 4 partials ⚠️
crates/pop-common/src/sourcing/mod.rs	50.00%	0 Missing and 3 partials ⚠️
crates/pop-cli/src/commands/up/contract.rs	0.00%	2 Missing ⚠️
crates/pop-cli/src/common/contracts.rs	0.00%	2 Missing ⚠️
crates/pop-parachains/src/build.rs	0.00%	0 Missing and 1 partial ⚠️

@@            Coverage Diff             @@
##             main     #360      +/-   ##
==========================================
+ Coverage   70.47%   72.59%   +2.12%     
==========================================
  Files          54       56       +2     
  Lines        9250    10700    +1450     
  Branches     9250    10700    +1450     
==========================================
+ Hits         6519     7768    +1249     
- Misses       1737     1844     +107     
- Partials      994     1088      +94     

Files with missing lines	Coverage Δ
crates/pop-common/src/lib.rs	61.29% <ø> (ø)
crates/pop-contracts/src/testing.rs	76.92% <100.00%> (ø)
crates/pop-parachains/src/build.rs	88.88% <0.00%> (+0.11%)	⬆️
crates/pop-cli/src/commands/up/contract.rs	18.38% <0.00%> (-5.51%)	⬇️
crates/pop-cli/src/common/contracts.rs	24.00% <0.00%> (+24.00%)	⬆️
crates/pop-common/src/sourcing/mod.rs	85.85% <50.00%> (+0.09%)	⬆️
crates/pop-contracts/src/up.rs	80.20% <50.00%> (+2.30%)	⬆️
crates/pop-contracts/src/call.rs	81.14% <40.00%> (+2.51%)	⬆️
crates/pop-contracts/src/node/mod.rs	64.62% <50.00%> (-0.09%)	⬇️

... and 9 files with indirect coverage changes

[al3mart]

Looks good. Thanks for addressing this!