feat: add securityContext at podlevel

[yanehi]

Problem

Due to a Kyverno policy, I would like to be able to set the securityContext at podlevel for all Kyverno pods. The chart currently only offers the possibility to set the securityContext at container level. This causes my Kyverno policy to fail only for the policy-reporter-kyverno-plugin-<random-string> pod.

Solution

I can optionally set the securityContext to podlevel with these incoming changes.

[sonatype-lift]

Sonatype Lift is retiring

Sonatype Lift will be retiring on Sep 12, 2023, with its analysis stopping on Aug 12, 2023. We understand that this news may come as a disappointment, and Sonatype is committed to helping you transition off it seamlessly. If you’d like to retain your data, please export your issues from the web console.
We are extremely grateful and thank you for your support over the years.

📖 Read about the impacts and timeline

[coveralls]

Pull Request Test Coverage Report for Build 5599077960

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.3%) to 92.724%

---

Totals
Change from base Build 5476988783:	0.3%
Covered Lines:	4320
Relevant Lines:	4659

---

💛 - Coveralls

[fjogeleit]

thanks for your contribution