fix lsp vfs and db dead lock.

[He1pa]

1. Does this PR affect any open issues?(Y/N) and add issue references (e.g. "fix #123", "re #123".):

• N
• Y

2. What is the scope of this PR (e.g. component or file name):

kclvm/tools/src/LSP/src/request.rs
kclvm/tools/src/LSP/src/state.rs

3. Provide a description of the PR(e.g. more details, effects, motivations or doc link):

dead lock cause by

process_vfs_changes() -> db.write() (lock) -> compile -> vfs.read() (block)
handle_x_request ()-> vfs.read() (lock)get_db()(block)

• Affects user behaviors
• Contains syntax changes
• Contains variable changes
• Contains experimental features
• Performance regression: Consumes more CPU
• Performance regression: Consumes more Memory
• Other

4. Are there any breaking changes?(Y/N) and describe the breaking changes(e.g. more details, motivations or doc link):

• N
• Y

5. Are there test cases for these changes?(Y/N) select and add more details, references or doc links:

• Unit test
• Integration test
• Benchmark (add benchmark stats below)
• Manual test (add detailed scripts or steps below)
• Other

[Peefy]

LGTM

[coveralls]

Pull Request Test Coverage Report for Build 8418210799

Details

• 3 of 5 (60.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 72.277%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
kclvm/tools/src/LSP/src/state.rs	1	3	33.33%

Totals
Change from base Build 8414900581:	0.0%
Covered Lines:	45116
Relevant Lines:	62421

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💛 - Coveralls