Restyle [dns-sd] Optimize memory usage of SRP client

[restyled-io]

A duplicate of #8370 with additional commits that automatically address
incorrect style, created by Restyled.

⚠️ Even though this PR is not a Fork, it contains outside contributions.
Please review accordingly.

Since the original Pull Request was opened as a fork in a contributor's
repository, we are unable to create a Pull Request branching from it with only
the style fixes.

The following Restylers made fixes:

• clang-format

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1. Merge this Pull Request instead of the original, or

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   the original Pull Request

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   ```console
   git remote add upstream https://github.com/project-chip/connectedhomeip.git
   git fetch upstream pull/<this PR number>/head
   git merge --ff-only FETCH_HEAD
   git push
   ```
   

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[todo]

Switch to max(commissionable TXT key size, operational TXT key size) after optimizing memory usage

connectedhomeip/src/platform/OpenThread/GenericThreadStackManagerImpl_OpenThread.h

Lines 187 to 196 in 6c84a76

	// TODO: Switch to max(commissionable TXT key size, operational TXT key size) after optimizing memory usage
	static constexpr uint8_t kMaxDnsServiceTxtKeySize = Mdns::OperationalAdvertisingParameters::kTxtMaxKeySize;
	#else
	// Thread only supports operational discovery.
	static constexpr uint8_t kMaxDnsServiceTxtEntriesNumber = Mdns::OperationalAdvertisingParameters::kTxtMaxNumber;
	static constexpr uint8_t kMaxDnsServiceTxtValueSize = Mdns::OperationalAdvertisingParameters::kTxtMaxValueSize;
	static constexpr uint8_t kMaxDnsServiceTxtKeySize = Mdns::OperationalAdvertisingParameters::kTxtMaxKeySize;
	#endif // CHIP_DEVICE_CONFIG_ENABLE_THREAD_COMMISSIONABLE_DISCOVERY
	DnsBrowseCallback mDnsBrowseCallback;

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This comment was generated by todo based on a TODO comment in 6c84a76 in #8466. cc @project-chip.