Move GetReadVersion* structs to GrvProxyInterface.h

[tclinkenbeard-oai]

This PR fixes a holdover from when there was only a single proxy role. Commit proxies no longer serve GRV requests, so it makes more sense for these structs to be with GrvProxyInterface

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[foundationdb-ci]

Result of foundationdb-pr-clang-ide on Linux RHEL 9

• Commit ID: b20ac72
• Duration 0:23:59
• Result: ✅ SUCCEEDED
• Error: N/A
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[foundationdb-ci]

Result of foundationdb-pr-clang-arm on Linux CentOS 7

• Commit ID: b20ac72
• Duration 0:42:59
• Result: ✅ SUCCEEDED
• Error: N/A
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[foundationdb-ci]

Result of foundationdb-pr-clang on Linux RHEL 9

• Commit ID: b20ac72
• Duration 0:56:07
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
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[foundationdb-ci]

Result of foundationdb-pr on Linux RHEL 9

• Commit ID: b20ac72
• Duration 0:58:28
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
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[foundationdb-ci]

Result of foundationdb-pr-cluster-tests on Linux RHEL 9

• Commit ID: b20ac72
• Duration 2:04:59
• Result: ✅ SUCCEEDED
• Error: N/A
• Build Log terminal output (available for 30 days)
• Build Workspace zip file of the working directory (available for 30 days)
• Cluster Test Logs zip file of the test logs (available for 30 days)