deps: update dependency com.google.cloud:google-cloud-spanner-bom to v6.103.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.cloud:google-cloud-spanner-bom	6.102.1 -> 6.103.0

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Release Notes

googleapis/java-spanner (com.google.cloud:google-cloud-spanner-bom)

v6.103.0

Compare Source

Features

• Add grpc.xds.resource_type label to xDS client metrics (#​4222) (97bed3c)
• Exposing AutoscalingConfig in InstancePartition (22edecf)

Bug Fixes

• Add env var to allow disabling directpath bound token (#​4189) (0ca9541)
• Allow DML THEN RETURN with retryAbortsInternally=false (#​4225) (f49cc47)
• deps: Update the Java code generator (gapic-generator-java) to 2.64.1 (22edecf)
• Remove URL encoding in project name (#​4188) (abba0c1)

Dependencies

• Update actions/checkout action to v5 (#​4166) (50a56f7)
• Update all tracing and telemetry dependencies (#​4230) (d60124c)
• Update dependency com.google.api.grpc:proto-google-cloud-trace-v1 to v2.79.0 (#​4172) (3a329fd)
• Update dependency com.google.auto.value:auto-value-annotations to v1.11.1 (#​4216) (84150c7)
• Update dependency com.google.cloud:google-cloud-trace to v2.79.0 (#​4174) (3e93ca0)
• Update dependency com.google.cloud:sdk-platform-java-config to v3.54.1 (#​4193) (ad235cf)
• Update dependency commons-cli:commons-cli to v1.11.0 (#​4218) (33449ba)
• Update dependency commons-io:commons-io to v2.21.0 (#​4198) (1f31169)
• Update dependency net.bytebuddy:byte-buddy to v1.18.1 (#​4214) (0c1d843)
• Update dependency net.bytebuddy:byte-buddy-agent to v1.18.1 (#​4215) (76ce01b)
• Update opentelemetry.version to v1.56.0 (#​4167) (a24f219)

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[dpebot]

/gcbrun