Release 0.49.0 tasks

[Neeharika-Sompalli]

• [x] Tag protobufs 0.49.0-alpha.0 and deploy to sonatype
• [x] Tag protobufs 0.49.0and release to maven central
• [x] Tag 0.49.0-alpha.0 in services
• [x] Tag 0.49.0-alpha.1 in services
• [x] Tag 0.49.0-alpha.2 in services
• [x] Create release branch
• [x] Tag 0.49.0-alpha.3 in services
• [x] Tag 0.49.0-alpha.4 in services
• [x] Tag 0.49.0-alpha.5 in services
• [x] Tag 0.49.0 in services
• [x] Tag 0.49.1 in services
• [x] Tag 0.49.2 in services
• [x] Tag 0.49.3 in services
• [x] Tag 0.49.4 in services
• [x] Tag 0.49.5 in services
• [x] Tag 0.49.6 in services
• [x] Tag 0.49.7 in services