Error running validation checks on all chains

Bug Description

Occasionally, the test to run validation checks on all chains - just validate "*" fails many checks. Upon looking at the error logs in CI, there appears to be a concurrent map read and map write occurring which causes this error. See CI Job output

Steps to Reproduce

run just validate "*"

Expected behavior

Validation should pass without errors/crashes.

Environment Information: N/A Configurations:

just validate "*"

Logs:

--- PASS: TestValidation/Shape_(360)/Uniqueness (0.00s)
--- PASS: TestValidation/Shape_Sepolia_Testnet_(11011)/Uniqueness (0.00s)
--- PASS: TestValidation/World_Chain_(480)/ChainID_RPC (0.10s)
concurrent map read and map write
--- PASS: TestValidation/Unichain_Sepolia_Testnet_(1301)/Uniqueness (0.00s)
--- PASS: TestValidation/Base_(8453)/Uniqueness (0.00s)

goroutine 217103 [running]:
github.com/ethereum-optimism/superchain-registry/validation.chainIDSet.AddIfUnique(...)
        /home/circleci/project/validation/uniqueness_test.go:26
github.com/ethereum-optimism/superchain-registry/validation.testIsGloballyUnique(0xc04e8864e0, 0xc00027c808)
        /home/circleci/project/validation/uniqueness_test.go:126 +0x1a5
github.com/ethereum-optimism/superchain-registry/validation.testUniversal.applyExclusions.func3(0xc04e8864e0)
        /home/circleci/project/validation/validation_test.go:43 +0x42

Additional context N/A

ethereum-optimism / superchain-registry

Error running validation checks on all chains #668