L0 provider: implement support for defer and blocking free

[igchor]

Description

This feature is necessary to properly support urUSMFree for v2 L0 adapter.

Checklist

• Code compiles without errors locally
• All tests pass locally
• CI workflows execute properly

• CI workflows, not executed per PR (e.g. Nightly), execute properly
• New tests added, especially if they will fail without my changes
• Added/extended example(s) to cover this functionality
• Extended the README/documentation
• All newly added source files have a license
• All newly added source files are referenced in CMake files
• Logger (with debug/info/... messages) is used

[bratpiorka]

@igchor do we need this for 0.10x / 2025.1?

[igchor]

@igchor do we need this for 0.10x / 2025.1?

No, for now I only want to use it for v2 L0 adapter which will not be released as part of 2025.1

[vinser52]

As a first step, I wanted to test this in UR (that's why I kept this as draft).

@igchor So we are not merging that till you confirm that UR works with the new UMF L0 config options and they do what UR needs?

[igchor]

As a first step, I wanted to test this in UR (that's why I kept this as draft).

@igchor So we are not merging that till you confirm that UR works with the new UMF L0 config options and they do what UR needs?

Yes, I'll undraft the PR once I manage to test this in UR

[lplewa]

any tests?

[igchor]

any tests?

For now, this will only be tested in UR. We can consider adding some tests in the future, but this will require adding a dependency on igc or committing a binary (the test requires executing a kernel).

[igchor]

@bratpiorka could you please merge this? I have a few more fixes/improvements pending that but I'd like this to be merged first