install_enroot_pyxis.sh install fails intermittently on HyperPod

[nghtm]

curl: (6) Could not resolve host: [github.com](http://github.com/)

"Traceback (most recent call last):
  File "/tmp/air-voiceforce-hyperpod-lifecycle-2/src/lifecycle_script.py", line 211, in <module>
    main(args)
  File "/tmp/air-voiceforce-hyperpod-lifecycle-2/src/lifecycle_script.py", line 184, in main
    ExecuteBashScript("./utils/install_enroot_pyxis.sh").run(node_type)
  File "/tmp/air-voiceforce-hyperpod-lifecycle-2/src/lifecycle_script.py", line 31, in run
    result.check_returncode()
  File "/usr/lib/python3.10/subprocess.py", line 457, in check_returncode
    raise CalledProcessError(self.returncode, self.args, self.stdout,"

subprocess.CalledProcessError: Command '['sudo', 'bash', './utils/install_enroot_pyxis.sh', <SlurmNodeType.COMPUTE_NODE: 'compute'>]' returned non-zero exit status 6.

[nghtm]

install_enroot_pyxis.sh.txt

Created this script to add exponential backoff to the curl commands. (Uploaded as .txt because github does not allow .sh attachments)

[amanshanbhag]

Seems similar to #675, where nodes aren't able to reach internet randomly during LCS execution. Weird that all previous packages were installed successfully (including apt and pip)