[BUG] Vault SDB driver overwrites whole secret

[lkubb]

Description
When calling sdb.set (or sdb.get_or_set_hash when writing) with the Vault SDB driver, there is no way to only update a single secret key.

Setup

• on-prem machine
• VM (Virtualbox, KVM, etc. please specify)
• classic packaging
• onedir packaging
• used bootstrap to install

• Existing Vault setup
• Existing Vault secret at some path, e.g. salt/minions/myminion

{
    "existing": "whatever",
    "important": "data"
}

• Vault SDB config

sdbvault:
  driver: vault

Steps to Reproduce the behavior

• salt-call sdb.set sdb://sdbvault/salt/minions/myminion/new "val"
• salt-call vault.read_secret salt/minions/myminion

Expected behavior

existing: whatever
important: data
new: val

Screenshots

new: val

Versions Report

salt --versions-report

(Provided by running salt --versions-report. Please also mention any differences in master/minion versions.)

Salt Version:
          Salt: 3005.1

Dependency Versions:
          cffi: 1.14.6
      cherrypy: unknown
      dateutil: 2.8.1
     docker-py: Not Installed
         gitdb: 4.0.9
     gitpython: 3.1.29
        Jinja2: 3.1.0
       libgit2: Not Installed
      M2Crypto: Not Installed
          Mako: Not Installed
       msgpack: 1.0.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     pycparser: 2.21
      pycrypto: Not Installed
  pycryptodome: 3.9.8
        pygit2: Not Installed
        Python: 3.9.16 (main, Nov  1 2022, 00:00:00)
  python-gnupg: 0.4.8
        PyYAML: 5.4.1
         PyZMQ: 23.2.0
         smmap: 5.0.0
       timelib: 0.2.4
       Tornado: 4.5.3
           ZMQ: 4.3.4

System Versions:
          dist: rocky 9.1 Blue Onyx
        locale: utf-8
       machine: x86_64
       release: 5.14.0-162.12.1.el9_1.0.1.x86_64
        system: Linux
       version: Rocky Linux 9.1 Blue Onyx

[dmurphy18]

Moving this to 3007 release given there is a fix already for it in #62684

[dmurphy18]

Note the fix in #62684, being moved to a salt extension, but it should be available when 3007 is released