[yugabyted] [QA] [2.21.1]Enable EAR command is failing

[yogesh-yb]

Jira Link: DB-11479

Description

Steps: 1. Create a cluster with basic configuration using ./bin/yugabyted start and then execute ./bin/yugabyted configure encrypt_at_rest --enable and observe it fails with
<< ERR >>

<<
[yugabyted encrypt_at_rest] 2024-05-27 19:13:23,991 ERROR: | 0.4s | Traceback (most recent call last):
File "/Users/ysharmaryugabyte.com/yugabyte-2.21.1.0/./bin/yugabyted", line 6671, in run
args.func()
File "/Users/ysharmaryugabyte.com/yugabyte-2.21.1.0/./bin/yugabyted", line 1580, in configure_encrypt_at_rest
if self.check_openssl():
^^^^^^^^^^^^^^^^^^^^
File "/Users/ysharmaryugabyte.com/yugabyte-2.21.1.0/./bin/yugabyted", line 1883, in check_openssl
return find_executable('openssl') == None
^^^^^^^^^^^^^^^
NameError: name 'find_executable' is not defined

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[gargsans-yb]

Adding a little more info on this:
The commit c1e156d deprecates the use of Python 2 from yugabyted.
The commit 1df9393 fixes a code which was present as part of Python2 support. This fix was not backported causing the failure.