revert: rspack sources substring heuristic algorithm #18493

Job	Run time
Check license of dependencies	24s
Pnpm Lockfile Check	24s
Check Source Changed	7s
Spell check	5s
Get Runner Labels / Get Runner Labels	1s
Test Release Linux	0s
Test Release Mac	0s
Test Release Windows	0s
Rust Changes	4s
Lint and format code	26s
Lint and format website	0s
Test Mac	0s
Test Linux / Build	4m 42s
Test Windows / Build	4m 24s
Rust test	4m 19s
Rust check	4m 28s
Rust test miri	0s
Check Rust Unused Dependencies	35s
Test Windows / Bench	1s
Test Windows / E2E Testing	1s
Test Windows / Test Node ${{ matrix.node }}	1s
Test Linux / E2E Testing	1s
Test Linux / Test Node ${{ matrix.node }}	1s
Test Linux / Bench	1s
Failure Notification	1s
	20m 6s

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