Eliminate use of `golang.org/x/crypto/ssh/terminal` package

__Proposal:__
Eliminate use of `golang.org/x/crypto/ssh/terminal` package in influxdb. The only function used is `terminal.IsTerminal`, which is just a wrapper around `term.IsTerminal`. Eliminating `golang.org/x/crypto/ssh/terminal` will ease auditing of the enterprise FIPS build.

__Current behavior:__
Non-FIPS (BoringCrypto) crypto libraries get pulled in, which creates potential issues with FIPS auditing due to pulling non-FIPS crypto functions.

__Desired behavior:__
The entire `golang.org/x/crypto/ssh` package is eliminated from the build.

__Alternatives considered:__
Using a Go workspace to substitute an alternate `golang.org/x/crypto` module. This requires a lot of code to replicate functionality in `golang.org/x/crypto`, as there are portions of `golang.org/x/crypto` that will call to the BoringCrypto library when used and can be linked into the final binary. This also requires a large chunk of code that isn't actually relevant to InfluxDB OSS.

__Use case:__
FIPS