Investigate and clean up calisphere*.cdlib.org DNS names

[christinklez]

See initial trello card (Feb 26, 2024): https://trello.com/c/z9YgHsRY/645-investiage-and-clean-up-calispherecdliborg-dns-names

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There are a bunch of confusing and possibly obsolete Calisphere DNS records that exist in Route 53, which we suspect are left over from when Calisphere was hosted on the same machine as OAC, and can probably be deleted?:

calisphere-dev.cdlib.org:
public+private CNAME: dsc-dsc2-dev.cdlib.org

calisphere-prd.cdlib.org:
public+private CNAME: dsc-dsc2-prd.cdlib.org

calisphere-stg.cdlib.org:
public+private CNAME: dsc-dsc2-stg.cdlib.org

calisphere2-dev.cdlib.org:
public+private CNAME: dsc-dsc2-dev.cdlib.org

calisphere2-prd.cdlib.org:
public+private CNAME: dsc-dsc2-prd.cdlib.org

calisphere2-stg.cdlib.org:
public+private CNAME: dsc-dsc2-stg.cdlib.org

calispherel-dev.cdlib.org:
public+private CNAME: dsc-dsc2-dev.cdlib.org

calispherel-stg.cdlib.org:
public+private CNAME: dsc-dsc2-stg.cdlib.org