nilrt: switch TMPDIR from tmp-glibc to tmp

[shubhanshumt26]

Justification

AB#3039672

Changes

Upstream openembedded-core dropped support for TCLIBCAPPEND, making separate TMPDIRs such as tmp-glibc unnecessary.

This PR updates NILRT to follow upstream behavior by replacing all tmp-glibc references with tmp. This aligns NILRT with current
OE-Core defaults and ensures consistent TMPDIR usage across glibc and musl builds.

No functional changes are introduced; this is a cleanup to maintain compatibility with upstream OE-Core.

Testing

• Verified that all packages are generated in tmp dir only.

Process

• This PR should be cherry-picked to the next/ ref.

Suggested Reviewers:

• @ni/rtos

[chaitu236]

This would require simultaneous updates to ni-central -next components and updates to rest of ni-central components later when we will make this the default distribution.

Are we forced to make this update? If not, this is a lot of work with very little ROI. I'd suggest making this a tech debt item and putting it in backlog.

[shubhanshumt26]

This would require simultaneous updates to ni-central -next components and updates to rest of ni-central components later when we will make this the default distribution.

Are we forced to make this update? If not, this is a lot of work with very little ROI. I'd suggest making this a tech debt item and putting it in backlog.

Yes, this update is required.
To avoid the large scope and low ROI of updating all ni-central components now, I’ve created a PR :
local.conf.sample: temporarily force TMPDIR to tmp-glibc with a temporary override matching the previous behavior.

This has been tested and works as expected. I’ve also created a Tech Debt item to properly update the components and remove this workaround later when tmp-glibc becomes the default.

Hence closing this PR.