chore: flaky validations test

[achettyiitr]

Description

• Even now, a few times tests are failing with i/o timeout, since we are running all of the tests in parallel. Removing parallel for now so that it can be more stable.

https://github.com/rudderlabs/rudder-server/actions/runs/6666283593/job/18117517599?pr=4026
=== FAIL: warehouse/validations TestValidator/Fetch_schema (25.01s)
    validate_test.go:368: 
        	Error Trace:	/home/runner/work/rudder-server/rudder-server/warehouse/validations/validate_test.go:368
        	Error:      	Received unexpected error:
        	            	fetch schema: fetching schema: read tcp [::1]:33190->[::1]:32872: i/o timeout
        	Test:       	TestValidator/Fetch_schema
    --- FAIL: TestValidator/Fetch_schema (25.01s)

• Although, if we feel that test times become a burden, we can explore other options in the future. Alteast we will stable tetsts.

package=./warehouse/validations/... make test
go install github.com/golang/mock/mockgen@v1.6.0
go install mvdan.cc/gofumpt@latest
go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.28.1
go install google.golang.org/grpc/cmd/protoc-gen-go-grpc@v1.2.0
go install gotest.tools/gotestsum@v1.10.0
go install golang.org/x/tools/cmd/goimports@latest
SLOW=0 gotestsum --format pkgname-and-test-fails -- -p=1 -v -failfast -shuffle=on -coverprofile=profile.out -covermode=atomic -coverpkg=./... -vet=all --timeout=15m ./warehouse/validations/... && touch _testok || true
✓  warehouse/validations (11.453s) (coverage: 9.7% of statements in ./...)

Linear Ticket

• Resolves PIPE-453

Security

• The code changed/added as part of this pull request won't create any security issues with how the software is being used.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (aa8044a) 71.36% compared to head (3533837) 71.38%.
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4027      +/-   ##
==========================================
+ Coverage   71.36%   71.38%   +0.01%     
==========================================
  Files         371      371              
  Lines       54681    54681              
==========================================
+ Hits        39023    39033      +10     
+ Misses      13323    13316       -7     
+ Partials     2335     2332       -3     

see 2 files with indirect coverage changes

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