[teslascope] remove deprecated apiKey auth

[psmedley]

The Teslascope service hsa deprecated the apikey method in favour of oauth and Personal Access Tokens (PATs).
Support for PATs was added on OH 5.2, and a warning was added to logs for users who are using ApiKeys to encourage then to nove to PATs.

The Teslascope maintainer intends to remove support for apiKeys at the end of 2026, which aligns nicely with the OH 5.3 release cycle, so this PR removes support for apikey and leaves only support for PATs.

This is a breaking change for anyone who has ignored the release notes for 5.2.

[Copilot]

Pull request overview

Removes the deprecated Teslascope API key authentication path from the Teslascope binding, leaving Personal Access Token (PAT) authentication as the only supported method in preparation for Teslascope’s planned API key shutdown.

Changes:

• Removed apiKey configuration from Thing metadata and i18n labels/descriptions.
• Simplified HTTP target methods and account handler logic to use PAT-only requests.
• Updated binding documentation to remove API key references.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
bundles/org.openhab.binding.teslascope/src/main/resources/OH-INF/thing/thing-types.xml	Removes API key config parameter from the account bridge metadata.
bundles/org.openhab.binding.teslascope/src/main/resources/OH-INF/i18n/teslascope.properties	Removes API key-related i18n strings for Thing configuration.
bundles/org.openhab.binding.teslascope/src/main/java/org/openhab/binding/teslascope/internal/TeslascopeWebTargets.java	Removes API key URL query auth path; uses PAT-only invocation.
bundles/org.openhab.binding.teslascope/src/main/java/org/openhab/binding/teslascope/internal/TeslascopeAccountHandler.java	Drops API key usage and deprecation warning; enforces PAT presence at init.
bundles/org.openhab.binding.teslascope/src/main/java/org/openhab/binding/teslascope/internal/TeslascopeAccountConfiguration.java	Removes deprecated apiKey field from configuration DTO.
bundles/org.openhab.binding.teslascope/README.md	Removes API key from configuration documentation.

Suppressed comments (1)

bundles/org.openhab.binding.teslascope/src/main/resources/OH-INF/thing/thing-types.xml:15

• The Personal Access Token is now the only supported credential, but the config metadata still marks it as optional and does not set a password context. This can lead to confusing UI validation and may display the token in clear text; mark it required and set password so UIs treat it as a secret.

			<parameter name="personalAccessToken" type="text" required="false">
				<label>Personal Access Token</label>
				<description>Personal Access Token provided by Teslascope</description>
			</parameter>

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