Fix stale Angular API links for renamed events and progress components

[viktorkombov]

Closes #361

Updates Angular docs API references and snippets to use current API names.

Changes:

• Replaced stale grid row editing refs with rowEditEnter, rowEdit, and rowEditExit.
• Replaced stale cell edit refs/snippets with cellEdit.
• Replaced stale column selection ref with columnSelectionChanging.
• Updated Circular Progress refs to use CircularProgressBar / IgxCircularProgressBarComponent and progressChanged.
• Updated Linear Progress refs to use LinearProgressBar / IgxLinearProgressBarComponent for its own inputs.
• Fixed the Linear Progress striped API link to point to member="striped".

Verified with Angular EN build, markdownlint, whitespace check, staging API type names, and source/dist scans for stale renamed event names.

Checklist:

• check topic's TOC/menu and paragraph headings
• Include TOC topic labels in the topic content when it has a valuable update, is new, or is considered preview / beta
• link to other topics using ../relative/path.md
• at the References section at the end of the topic add links to topics, samples, etc
• reference API documentation instead of adding a section with API

• use valid component names - [Data] Grid, IgxSelectComponent, <igx-combo>
• use spell checker tool (VS Code, Grammarly, Microsoft Editor)
• add inline code blocks for the names of classes / tags / properties
• add language descriptor for the code blocks
• check if links function by running the check-api/mdx npm commands
• check if sample is working and fully visible in the topic
• check if sample is working and fully visible in the StackBlitz
• check if code blocks match the code in StackBlitz demo

• follow SEO guidelines to fill topic's metadata (SEO guidelines)

• do not resolve requested changes (leave that to the reviewer)