internal,cmd/internal: relocate covcmd package from std to cmd

Relocate the 'covcmd' package from .../internal/coverage to
.../cmd/internal/cov, to reflect the fact that the definitions in this
package are used only in cmd, not in std.

Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-longtest,gotip-windows-amd64-longtest
Change-Id: I65bcc34736d1d0a23134a6c91c17ff138cd45431
Reviewed-on: https://go-review.googlesource.com/c/go/+/526595
Reviewed-by: Bryan Mills <bcmills@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

src/cmd/compile/internal/base/flag.go

@@ -5,11 +5,11 @@
 package base
 
 import (
+	"cmd/internal/cov/covcmd"
 	"encoding/json"
 	"flag"
 	"fmt"
 	"internal/buildcfg"
-	"internal/coverage/covcmd"
 	"internal/platform"
 	"log"
 	"os"

src/cmd/cover/cfg_test.go

@@ -5,9 +5,9 @@
 package main_test
 
 import (
+	"cmd/internal/cov/covcmd"
 	"encoding/json"
 	"fmt"
-	"internal/coverage/covcmd"
 	"internal/testenv"
 	"os"
 	"path/filepath"

src/cmd/cover/cover.go

@@ -6,6 +6,7 @@ package main
 
 import (
 	"bytes"
+	"cmd/internal/cov/covcmd"
 	"encoding/json"
 	"flag"
 	"fmt"
@@ -13,7 +14,6 @@ import (
 	"go/parser"
 	"go/token"
 	"internal/coverage"
-	"internal/coverage/covcmd"
 	"internal/coverage/encodemeta"
 	"internal/coverage/slicewriter"
 	"io"
@@ -51,7 +51,7 @@ where -pkgcfg points to a file containing the package path,
 package name, module path, and related info from "go build",
 and -outfilelist points to a file containing the filenames
 of the instrumented output files (one per input file).
-See https://pkg.go.dev/internal/coverage/covcmd#CoverPkgConfig for
+See https://pkg.go.dev/cmd/internal/cov/covcmd#CoverPkgConfig for
 more on the package config.
 `
 

src/cmd/dist/buildtool.go

@@ -63,7 +63,7 @@ var bootstrapDirs = []string{
 	"go/constant",
 	"internal/abi",
 	"internal/coverage",
-	"internal/coverage/covcmd",
+	"cmd/internal/cov/covcmd",
 	"internal/bisect",
 	"internal/buildcfg",
 	"internal/goarch",

src/cmd/go/internal/work/action.go

@@ -9,12 +9,12 @@ package work
 import (
 	"bufio"
 	"bytes"
+	"cmd/internal/cov/covcmd"
 	"container/heap"
 	"context"
 	"debug/elf"
 	"encoding/json"
 	"fmt"
-	"internal/coverage/covcmd"
 	"internal/platform"
 	"os"
 	"path/filepath"

src/cmd/go/internal/work/cover.go

@@ -10,11 +10,11 @@ import (
 	"cmd/go/internal/base"
 	"cmd/go/internal/cfg"
 	"cmd/go/internal/str"
+	"cmd/internal/cov/covcmd"
 	"context"
 	"encoding/json"
 	"fmt"
 	"internal/coverage"
-	"internal/coverage/covcmd"
 	"io"
 	"os"
 	"path/filepath"

src/cmd/go/internal/work/exec.go

@@ -8,13 +8,13 @@ package work
 
 import (
 	"bytes"
+	"cmd/internal/cov/covcmd"
 	"context"
 	"crypto/sha256"
 	"encoding/json"
 	"errors"
 	"fmt"
 	"go/token"
-	"internal/coverage/covcmd"
 	"internal/lazyregexp"
 	"io"
 	"io/fs"

src/go/build/deps_test.go

@@ -625,7 +625,7 @@ var depsRules = `
 	< internal/coverage/cformat;
 
 	internal/coverage, crypto/sha256, FMT
-	< internal/coverage/covcmd;
+	< cmd/internal/cov/covcmd;
 
     encoding/json,
 	runtime/debug,