chore: upgrade okhttp3 in camel-salesforce-component

[tmielke]

Upgrading dependency com.squareup.okhttp3:okhttp to latest 5.3.2 version (already defined in parent/pom.xml)
as currently used version 3.14.9 is 6 years old!
This updates camel-salesforce/camel-salesforce-component to use com.squareup.okhttp3:okhttp-jvm:5.3.2 and
com.squareup.okhttp3:mockwebserver3:5.2.
An update to unit test RawPayloadTest was needed for the tests to pass.

With this upgrade, no other Camel component or module depends on property ${squareup-okhttp-version} as defined in parent/pom.xml. So removing this property entirely, relying only on ${squareup-okhttp5-version}.
All of Camel rebuilt successfully with the property removed from parent/pom.xml.

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[github-actions]

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[github-actions]

🧪 CI tested the following changed modules:

• components/camel-huawei/camel-huaweicloud-obs
• components/camel-jetty
• components/camel-olingo2/camel-olingo2-component
• components/camel-salesforce/camel-salesforce-component
• parent

ℹ️ Dependent modules were not tested because the total number of affected modules exceeded the threshold (50). Use the test-dependents label to force testing all dependents.

✅ POM dependency changes: targeted tests included

Changed properties: squareup-okhttp-version

Modules affected by dependency changes (1)

• :camel-salesforce

⚠️ Some tests are disabled on GitHub Actions (@DisabledIfSystemProperty(named = "ci.env.name")) and require manual verification:

• components/camel-jetty: 1 test(s) disabled on GitHub Actions

Build reactor — dependencies compiled but only changed modules were tested (5 modules)

• Camel :: Huawei Cloud :: OBS
• Camel :: Jetty
• Camel :: Olingo2 (Deprecated) :: Component
• Camel :: Parent
• Camel :: Salesforce

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