Warn about build not supported on arm

[forest-code42]

Closes #24312

This docker image only has an amd64 version: https://quay.io/repository/influxdb/cross-builder?tab=info

And there is no published Dockerfile for it.

There is no mention of how to compile on arm on the docs. There are open, reproducible issues w/ compiling influxdb on arm. Please save us some time and be upfront about requirements to build influxdb.

• I've read the contributing section of the project README.

• [] Signed CLA

  • I DON'T WANT TO REPRESENT MY EMPLOYER ON A CONTRACT LIKE THIS, THIS IS JUST A DOC FIX, CHILL

[forest-code42]

If you want to reproduce this issue, see https://github.com/forest-code42/influxdb-issue-24312/tree/main

docker build --progress=plain . on an ARM machine (apple laptop here) to reproduce this issue. it fails at make with:

#25 40.20 + env GO111MODULE=on go build -tags sqlite_foreign_keys,sqlite_json,assets -ldflags  -X main.commit=407fa622e9 -X main.version=v2.7.1 -o bin/linux/influxd ./cmd/influxd
#25 40.76 # github.com/influxdata/flux
#25 40.76 /root/go/pkg/mod/github.com/influxdata/[email protected]/runtime.go:48:27: undefined: libflux.Options
#25 42.44 # github.com/influxdata/influxdb/v2/sqlite
#25 42.44 sqlite/sqlite.go:187:28: destSqliteConn.Backup undefined (type *sqlite3.SQLiteConn has no field or method Backup)
#25 50.83 make: *** [GNUmakefile:84: bin/linux/influxd] Error 1
#25 ERROR: executor failed running [/bin/sh -c export GOOS=linux &&     export GOARCH=amd64 &&     export GOEXPERIMENT=boringcrypto &&     uname -a && make  SHELL='sh -x']: exit code: 2