K8SPS-322 - fix TEMP_DIR in E2E tests, change drop-finalizer step to have 99- prefix in all tests

[tplavcic]

Instead of using TEMP_DIR=$(mktemp -d) we now use TEMP_DIR="/tmp/kuttl/ps/${test_name}" and it is being initialized only once in the first step in the test. Previously it was initialized in all TestSteps.

CHANGE DESCRIPTION

Problem:
Short explanation of the problem.

Cause:
Short explanation of the root cause of the issue if applicable.

Solution:
Short explanation of the solution we are providing with this PR.

CHECKLIST

Jira

• Is the Jira ticket created and referenced properly?
• Does the Jira ticket have the proper statuses for documentation (Needs Doc) and QA (Needs QA)?
• Does the Jira ticket link to the proper milestone (Fix Version field)?

Tests

• Is an E2E test/test case added for the new feature/change?
• Are unit tests added where appropriate?

Config/Logging/Testability

• Are all needed new/changed options added to default YAML files?
• Are the manifests (crd/bundle) regenerated if needed?
• Did we add proper logging messages for operator actions?
• Did we ensure compatibility with the previous version or cluster upgrade process?
• Does the change support oldest and newest supported PS version?
• Does the change support oldest and newest supported Kubernetes version?

[JNKPercona]

Test name	Status
async-ignore-annotations	passed
auto-config	passed
config	passed
config-router	passed
demand-backup	passed
gr-demand-backup	passed
gr-demand-backup-haproxy	passed
gr-haproxy	passed
gr-ignore-annotations	passed
gr-init-deploy	passed
gr-one-pod	passed
gr-recreate	passed
gr-scaling	passed
gr-self-healing	passed
gr-tls-cert-manager	passed
gr-users	passed
haproxy	passed
init-deploy	passed
limits	passed
monitoring	passed
one-pod	passed
operator-self-healing	passed
recreate	passed
scaling	passed
service-per-pod	passed
sidecars	passed
smart-update	passed
tls-cert-manager	passed
users	passed
version-service	passed
We run 30 out of 30

commit: 6c839b6
image: perconalab/percona-server-mysql-operator:PR-481-6c839b6