TimescaleDB: Add psql to timescaledb migration scripts

[Nana-EC]

Detailed description:
Mirror node using existing v1 schema will need to migrate from a postgres db to a new timescaledb.
We should offer some scripts to help operators migrate with ease

• Add a csvBackupTables.sql file that backs up v1 tables to separate csv files for future restore
• Add a createHyperTables.sql file that updated the table schema differences and create Hyper table prior to restore
• Add a csvRestoreTables.sql file that uses COPY to restore back files for each of the tables
• Add a updateSchema.sql file that handles schema difference and runs after data migration to ensure data is in sync
• Add a migration.config file that hold the config values for a script to run all the migration steps
• Add a migration.sh main script that orchestrates the migration utilizing all the stages
• Add a init_v2.sql file that may be used to initiate a timescale db node by creating the database and users with appropriate permissions
• Rename init.sql to init_v1.sql
• Update the installation.md file with instruction on timescaledb setup
• Update the operations.md file with instructions on v1 to v2 migration procedure
• Update importer config with concept of importer user that differs from owner user
• Update helm chart to support deployment of timescaledb with new custom schema

Which issue(s) this PR fixes:
Fixes #1309

Special notes for your reviewer:
Verified flow in

• local postgres docker instance to local timescaledb instance

To-do:

• GCP cloud sql to GKE - May need additional work to setup secrets, IAM access etc

Checklist

• Documentation added
• Tests updated

[codecov]

Codecov Report

Merging #1364 (2af6559) into master (0e8aa40) will not change coverage.
The diff coverage is n/a.

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  Coverage     85.36%   85.36%           
- Complexity      364      365    +1     
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  Files           257      257           
  Lines          6367     6367           
  Branches        689      689           
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  Hits           5435     5435           
  Misses          707      707           
  Partials        225      225           

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[steven-sheehy]

LGTM

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[xin-hedera]

LGTM