feat(deploy): add secret/config map hash to pod templates

[ebaron]

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Fixes: #119

Description of the change:

1. For each operand pod, collect all secrets and config maps used in volumes and environment variables
2. In alphanumeric order, marshal each secret/config map's key-value pairs as JSON, and concatenate the results
3. Hash the concatenated JSON. For secrets, use SHA256. For config maps, use FNV-1, which is faster for non-sensitive data.
4. Add the hashes as annotations to the appropriate pod template.

Other changes:

• Format/indent the OAuth2 proxy config map for readability
• Indentation changes for configmap/secret data in test files. Since we're hashing these, indentation matters for the resulting hashes.
• Modified the test client to move each secret's StringData field to Data upon write. This mirrors what's done by a real API server.

Motivation for the change:

• Cryostat setups don't stop working when certificates are renewed by cert-manager.

How to manually test:

1. Build and deploy PR with a default CR
2. Download cmctl: https://github.com/cert-manager/cmctl/releases/tag/v2.2.0
3. Manually renew a certificate: /path/to/cmctl renew cryostat-sample
4. Verify that a new Cryostat pod has been rolled out. The same approach can be used for database/storage/reports pods.

[ebaron]

/build_test

[ebaron]

We should also probably implement something similar for agent auto-configuration. This will be trickier though as it can only be done at the pod template level and we currently only operate on pods. This would depend on #1088.

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[andrewazores]

Seems to work great!