[UCT] Developed Existence index

[bohdan-harniuk]

Description (*)

What was done:

• developed new index for storing existence state for classes/interfaces, public/protected constants && fields && methods
• refactored deprecated index
• enhanced reindexing process
• reindexed Magento from V.2.3.0 till V.2.4.3 (existence index)
• enhanced index processors

Fixed Issues (if relevant)

1. Fixes [UCT] Add index for storing Magento 2 (from v.2.3.0) codebase state of existence #702

Steps to test reindex process (existence index):

1. Download sandbox data for testing (attached below 👇)
2. Extract it to the IntelliJ Magento 2 PHPStorm Plugin Sandbox Project into the <project-root>/app/code
3. Reindex one by one folders from V1 to V5 (via context menu action: Reindex the UCT versioned indexes)
4. In the reindex dialog choose target version (V1 - 2.3.0, V2 - 2.3.1, V3 - 2.3.2, V4 - 2.3.2-p2, V5 - 2.3.3)
5. In the reindex dialog choose target index (Existence)
6. Click the "Reindex" button

Сheck compliance with the expected data:

To get readable data from the stored index debug: com.magento.idea.magento2uct.versioning.processors.ExistenceIndexProcessor#save and underlying saving process.

Expected data:

FILES	V1	V2	V3	V4	V5
A	✅
B	✅	❌
C	✅				❌
D		✅
E		✅
F			✅
G			✅
H			✅	❌
A.property	✅
A.method		✅	❌		✅
B.CON	✅	❌
C.CON	✅		❌
D.method		✅
E.property		✅	❌
E.property2			✅
F.property1					✅
F.property2					✅
F.method1					✅
F.method2					✅
Summary:	6 added	5 added, 2 deleted	4 added, 3 deleted	1 deleted	5 added, 1 deleted

Sandbox data for testing: Sandbox.zip

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with integration/functional tests (if applicable)
• All automated tests passed successfully (all builds are green)

[andrewbess]

Hello @bohdan-harniuk
Thank you for your contribution here.
Great job