chore: bump pyelftools to 0.30

[rishyak]

Summary of changes

It's time to bump pyelftools to 0.30.

Documentation

None

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Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[] Feature update (New feature / Functionality change / New API)
[] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[] Tests / results supplied as part of this PR

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[0xc0170]

Hi @rishyak , what is the reason to bump (is there specific bug to be fixed that affects our tooling) ?

It looks simple to update, but we dont update tooling.

[0xc0170]

I'll close this if there is no requirement to update the component.

[rishyak]

Apologies for the lateness, @0xc0170.

This was causing issues issues with using PlatformIO before we changed toolchains entirely. Either way, this was fixed on PIO's end as well.