fix(openthread-core-esp32x-mtd-config.h): Enable MTD Joiner role (IDFGH-12457)

[feherdave]

On ESP32 MTD devices Joiner role functionality was not working even if 'Joiner enable' was checked in SDK config because 0 was defined in OPENTHREAD_CONFIG_JOINER_ENABLE macro. Value modified to 1 to resolve the issue. Tested and working on ESP32 H2 MTD device.

[github-actions]

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Some issues found for the commit messages in this PR: the commit message "Fix openthread-core-esp32x-mtd-config.h: OPENTHREAD_CONFIG_JOINER_ENABLE macro value": body's lines must not be longer than 100 characters summary looks empty type/action looks empty Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 20 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

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[zwx1995esp]

Hi, @feherdave , sorry for the delay, I was blocked by some other works, and I will start this process right now.