Fix tests on QNX

[eleir9268]

Description

Fix tests on QNX.

Don't attempt to open "/proc/self/status" which does not exist on QNX.

Disabled resumable task tests, since that functionality is disabled in include/oneapi/tbb/detail/_config.h (the __TBB_RESUMABLE_TASKS flag)

We have a different flag, RLIMIT_NTHR, for the thread resource than the linux setrlimit implementation.
https://www.qnx.com/developers/docs/8.0/com.qnx.doc.neutrino.lib_ref/topic/s/setrlimit.html

Fixes # - issue number(s) if exists

Type of change

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• bug fix - change that fixes an issue
• new feature - change that adds functionality
• tests - change in tests
• infrastructure - change in infrastructure and CI
• documentation - documentation update

Tests

• added - required for new features and some bug fixes
• not needed

Documentation

• updated in # - add PR number
• needs to be updated
• not needed

Breaks backward compatibility

• Yes
• No
• Unknown

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Other information

[omalyshe]

Update copyrights.

[eleir9268]

I added changes for an out-of-source build to https://github.com/qnx-ports/build-files .
Workflow: https://github.com/qnx-ports/build-files/actions/runs/18282477150