feat: Update html and pdf converters to handle ByteStream(s)

[vblagoje]

Why:

Extend the input handling capabilities of HTMLToDocument and PyPDFToDocument to process ByteStream inputs, thus enhancing the flexibility and utility of these converters.

What:

• Updated HTMLToDocument to handle ByteStream input.
• Updated PyPDFToDocument to handle ByteStream input.

How Did You Test It:

Proper testing was performed including unit and integration tests to validate the functionality of the updated input handling mechanism. Manual testing was also conducted to ensure ByteStream inputs were processed accurately.

Notes for Reviewer:

• Would appreciate a review on the updated input handling logic to ensure it aligns with project standards and efficiently handles ByteStream inputs without any glitches.

[vblagoje]

@ZanSara any idea why import for pypdf fails? It worked before...

[vblagoje]

@ZanSara is volunteering for this one, as you @julian-risch are already working on LCF

[vblagoje]

Closing, superseded by #6020 and #6021