fix: Skip analysis for not used copybook

[Nurkambay]

How Has This Been Tested?

• Test A

1. Open program A that refers to copybook A
2. Open 'copybook A' and add an error
3. Ensure that program A was reanalyzed
4. Create a new COBOL file
5. Modify the new COBOL file
6. Ensure program A was not analyzed

• Test B

1. Open program A that refers to copybook A
2. Open program B that refers to copybook B
3. Open program C that refers to copybook A and copybook B
4. Open 'copybook A' and add an error
5. Ensure that program A and program C was reanalyzed
6. Ensure that program B was not reanalyzed

• Test C

1. Open program D that refers to copybook D
2. Open copybook D that refers to copybook A
3. Open copybook A and add an error
4. Ensure that program A was reanalyzed
5. Ensure that program A, copybook D and copybook A have errors

Checklist:

• Each of my commits contains one meaningful change
• I have performed rebase of my branch on top of the development
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings