sapcar_extract: Update SAPCAR command from PATH and add explanation with HANA limitations

[marcelmamula]

Changes

Reported in #85

• Change sapcar executable to SAPCAR when using PATH.

s02pas:s02adm 1001> which sapcar SAPCAR
sapcar: Command not found.
/usr/sap/S02/SYS/exe/uc/linuxx86_64/SAPCAR

h02adm@s02hana0:/usr/sap/H02/HDB90> which sapcar SAPCAR
which: no sapcar in (/lss/shared/H02/exe:/usr/sap/H02/HDB90/exe/krb5/bin:/usr/sap/H02/HDB90/exe/krb5/sbin:/usr/sap/H02/HDB90/s02hana0:/usr/sap/H02/HDB90:/usr/sap/H02/HDB90/exe:/usr/sap/H02/HDB90/exe/mdc:/usr/sap/H02/HDB90/exe/Python3/bin:/usr/sap/H02/HDB90/exe/dat_bin_dir:/usr/sap/H02/home:/usr/sap/H02/home/.local/bin:/usr/local/bin:/usr/bin:/bin)
/usr/sap/H02/HDB90/exe/SAPCAR

• Add explanation of limitations in this scenario when used with SAP HANA user.

Reason for limitation

SAP HANA comes with bundled outdated Python version, causing incompatibility with ansible-core version on Control node.

fatal: [b01hana]: FAILED! =>
    ansible_facts:
        discovered_interpreter_python: /usr/bin/python3.13
    changed: false
    module_stderr: |-
        Shared connection to b01hana closed.
    module_stdout: |-
        Traceback (most recent call last):
          File "/var/tmp/ansible-tmp-1781867144.5599601-864630-36766788676533/AnsiballZ_sapcar_extract.py", line 5, in <module>
            import datetime
          File "/usr/sap/H01/HDB90/exe/Python3/lib/python3.8/datetime.py", line 8, in <module>
            import math as _math
        ModuleNotFoundError: No module named 'math'
    msg: 'Module result deserialization failed: No start of json char found'
    rc: 1

Tests

Tested with variations of following task

    - name: Execute module sapcar_extract
      community.sap_libs.sapcar_extract:
        path: /software/sap_swpm_download_basket/SAPEXEDB_50-70008101.SAR
        dest: /tmp/sapcar_extract
        overwrite: true
      become: true
      become_user: s02adm
      become_method: sudo
      become_flags: "-i"

[marcelmamula]

@herrmie Are you able to test it?