refactor: unify names in ir and ir_cli crates

[Peefy]

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

• N
• Y

refactor: unify names in ir and ir_cli crates

• Hostapi -> HostAPI
• HostAPI -> HostAPI
• HOSTAPI -> HostAPI
• Defination -> MetadataDefinition

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

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

• Affects user behaviors
• Contains CI/CD configuration changes
• Contains documentation 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

6. Release note

None

[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[Peefy]

I have read the CLA Document and I hereby sign the CLA

[amyXia1994]

/recheck

[i-zhen]

LGTM