[ARMPL] Fix a bug in the installation of GCC required by ARM Performance Library to cover both gcc 9.3 and gcc 11.3. In particular gcc 9.3.0 requires ftp endpoint, whereas gcc 11.3.0 requires http endpoint.

[gmarciani]

Description of changes

Fix a bug in the installation of GCC required by ARM Performance Library to cover both gcc 9.3 and gcc 11.3.
In particular gcc 9.3.0 requires ftp endpoint, whereas gcc 11.3.0 requires http endpoint.

The regression was introduced by #2942, where we replace only http endpoint (gcc-11.3), while we should cover both ftp (gcc-9.3) and http (gcc-11.3).

Tests

Build image succeeded on both AL2 (using gcc9.3) and AL23 (using gcc11.3)
ARMPL installation succeeds on both AL2 and AL23 and verified from logs that gcc dependencioes are fetched from our public buckets both when using gcc9.3 and gcc11.3.

References

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