Activate LSP for schema and schema extension files #7102

Job	Run time
Compiler output check (ubuntu-latest)	4m 25s
JS Lint	57s
Rust Tests (ubuntu-latest)	5m 19s
Compiler output check (macos-latest)	5m 23s
Build Rust Compiler (ubuntu-latest)	4m 7s
Build Rust Compiler (ubuntu-latest)	5m 42s
Rust Tests (macos-latest)	7m 43s
JS Tests (Node 14.x)	1m 23s
Rust Tests (windows-latest)	5m 57s
Build Rust Compiler (macos-latest)	4m 5s
JS Tests (Node 16.x)	1m 34s
Build Rust Compiler (macos-latest)	4m 41s
Rust Lint	15s
Build Rust Compiler (windows-latest)	5m 59s
Flow Typecheck	35s
VSCode Extension Lint	18s
Publish to NPM	0s
	58m 23s

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