Export MockResolverContext type on relay test utils #8211

Job	Run time
JS Lint	53s
Rust Tests (ubuntu-latest)	5m 55s
Compiler output check (ubuntu-latest)	4m 30s
Build Rust Compiler (ubuntu-latest)	4m 36s
Rust Tests (macos-latest)	3m 19s
Compiler output check (macos-latest)	3m 26s
Build Rust Compiler (ubuntu-latest)	6m 5s
Rust Tests (windows-latest)	7m 11s
JS Tests (Node 18.x)	1m 27s
Build Rust Compiler (macos-latest)	4m 11s
JS Tests (Node 20.x)	1m 32s
Build Rust Compiler (macos-latest)	3m 54s
Rust Lint	26s
Build Rust Compiler (windows-latest)	9m 55s
Flow Typecheck	35s
VSCode Extension Lint	26s
Publish to NPM	1m 45s
	1h 0m 6s

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