fix: epel repos not working with some RHEL images

[dkoshkin]

What problem does this PR solve?:
Seen in Azure where $releasever is not being correctly replaced, but can happen in other images

I was able to repro this issue in Azure and test this fix, see:

TASK [repo : add alma linux extra repository] **********************************
changed: [20.228.111.34]

TASK [repo : install epel-release for RHEL 8.x] ********************************
changed: [20.228.111.34]

TASK [repo : find epel-release repo files] *************************************
ok: [20.228.111.34]

TASK [repo : set $releasever variables in epel-release repo files] *************
changed: [20.228.111.34] => (item={'path': '/etc/yum.repos.d/epel-modular.repo', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 1177, 'inode': 2118938, 'dev': 64772, 'nlink': 1, 'atime': 1607202791.0, 'mtime': 1607202791.0, 'ctime': 1676064021.6165278, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [20.228.111.34] => (item={'path': '/etc/yum.repos.d/epel-playground.repo', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 1259, 'inode': 2118939, 'dev': 64772, 'nlink': 1, 'atime': 1607202791.0, 'mtime': 1607202791.0, 'ctime': 1676064021.6165278, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [20.228.111.34] => (item={'path': '/etc/yum.repos.d/epel-testing-modular.repo', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 1276, 'inode': 2118940, 'dev': 64772, 'nlink': 1, 'atime': 1607202791.0, 'mtime': 1607202791.0, 'ctime': 1676064021.6175277, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [20.228.111.34] => (item={'path': '/etc/yum.repos.d/epel-testing.repo', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 1213, 'inode': 2118941, 'dev': 64772, 'nlink': 1, 'atime': 1607202791.0, 'mtime': 1607202791.0, 'ctime': 1676064021.6175277, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
changed: [20.228.111.34] => (item={'path': '/etc/yum.repos.d/epel.repo', 'mode': '0644', 'isdir': False, 'ischr': False, 'isblk': False, 'isreg': True, 'isfifo': False, 'islnk': False, 'issock': False, 'uid': 0, 'gid': 0, 'size': 1114, 'inode': 2118942, 'dev': 64772, 'nlink': 1, 'atime': 1607202791.0, 'mtime': 1607202791.0, 'ctime': 1676064021.6175277, 'gr_name': 'root', 'pw_name': 'root', 'wusr': True, 'rusr': True, 'xusr': False, 'wgrp': False, 'rgrp': True, 'xgrp': False, 'woth': False, 'roth': True, 'xoth': False, 'isuid': False, 'isgid': False})
...
TASK [setup_versionlock : install yum utilities] *******************************
changed: [20.228.111.34]

Which issue(s) does this PR fix?:

• https://d2iq.atlassian.net/browse/D2IQ-95864

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[github-actions]

File	Coverage
All files	14%	❌
cmd/konvoy-image-wrapper/cmd/wrapper.go	8%	❌
cmd/konvoy-image-wrapper/image/common.go	0%	❌
cmd/konvoy-image-wrapper/image/image_not_embedded.go	0%	❌
pkg/ansible/runner.go	0%	❌
pkg/app/artifacts.go	0%	❌
pkg/app/build.go	0%	❌
pkg/app/build_azure.go	2%	❌
pkg/app/build_gcp.go	0%	❌
pkg/app/config.go	50%	❌
pkg/app/errors.go	0%	❌
pkg/app/provision.go	0%	❌
pkg/app/root.go	0%	❌
pkg/app/utils.go	7%	❌
pkg/app/validate.go	0%	❌
pkg/appansible/io.go	0%	❌
pkg/appansible/playbook.go	0%	❌
pkg/azure/azure.go	0%	❌
pkg/logging/logger.go	0%	❌
pkg/packer/manifest.go	0%	❌
pkg/packer/packer.go	0%	❌
pkg/stringutil/rand.go	0%	❌
pkg/version/info.go	8%	❌

Minimum allowed coverage is 75%

Generated by 🐒 cobertura-action against 802174e

[dlipovetsky]

Thanks for gating these changes on the RHEL version, and for the helpful comment.