feat(cache): redis cache (#8822)

# Which Problems Are Solved

Add a cache implementation using Redis single mode. This does not add
support for Redis Cluster or sentinel.

# How the Problems Are Solved

Added the `internal/cache/redis` package. All operations occur
atomically, including setting of secondary indexes, using LUA scripts
where needed.

The [`miniredis`](https://github.com/alicebob/miniredis) package is used
to run unit tests.

# Additional Changes

- Move connector code to `internal/cache/connector/...` and remove
duplicate code from `query` and `command` packages.
- Fix a missed invalidation on the restrictions projection

# Additional Context

Closes #8130

internal/cache/connector_enumer.go

@@ -0,0 +1,98 @@
+// Code generated by "enumer -type Connector -transform snake -trimprefix Connector -linecomment -text"; DO NOT EDIT.
+
+package cache
+
+import (
+	"fmt"
+	"strings"
+)
+
+const _ConnectorName = "memorypostgresredis"
+
+var _ConnectorIndex = [...]uint8{0, 0, 6, 14, 19}
+
+const _ConnectorLowerName = "memorypostgresredis"
+
+func (i Connector) String() string {
+	if i < 0 || i >= Connector(len(_ConnectorIndex)-1) {
+		return fmt.Sprintf("Connector(%d)", i)
+	}
+	return _ConnectorName[_ConnectorIndex[i]:_ConnectorIndex[i+1]]
+}
+
+// An "invalid array index" compiler error signifies that the constant values have changed.
+// Re-run the stringer command to generate them again.
+func _ConnectorNoOp() {
+	var x [1]struct{}
+	_ = x[ConnectorUnspecified-(0)]
+	_ = x[ConnectorMemory-(1)]
+	_ = x[ConnectorPostgres-(2)]
+	_ = x[ConnectorRedis-(3)]
+}
+
+var _ConnectorValues = []Connector{ConnectorUnspecified, ConnectorMemory, ConnectorPostgres, ConnectorRedis}
+
+var _ConnectorNameToValueMap = map[string]Connector{
+	_ConnectorName[0:0]:        ConnectorUnspecified,
+	_ConnectorLowerName[0:0]:   ConnectorUnspecified,
+	_ConnectorName[0:6]:        ConnectorMemory,
+	_ConnectorLowerName[0:6]:   ConnectorMemory,
+	_ConnectorName[6:14]:       ConnectorPostgres,
+	_ConnectorLowerName[6:14]:  ConnectorPostgres,
+	_ConnectorName[14:19]:      ConnectorRedis,
+	_ConnectorLowerName[14:19]: ConnectorRedis,
+}
+
+var _ConnectorNames = []string{
+	_ConnectorName[0:0],
+	_ConnectorName[0:6],
+	_ConnectorName[6:14],
+	_ConnectorName[14:19],
+}
+
+// ConnectorString retrieves an enum value from the enum constants string name.
+// Throws an error if the param is not part of the enum.
+func ConnectorString(s string) (Connector, error) {
+	if val, ok := _ConnectorNameToValueMap[s]; ok {
+		return val, nil
+	}
+
+	if val, ok := _ConnectorNameToValueMap[strings.ToLower(s)]; ok {
+		return val, nil
+	}
+	return 0, fmt.Errorf("%s does not belong to Connector values", s)
+}
+
+// ConnectorValues returns all values of the enum
+func ConnectorValues() []Connector {
+	return _ConnectorValues
+}
+
+// ConnectorStrings returns a slice of all String values of the enum
+func ConnectorStrings() []string {
+	strs := make([]string, len(_ConnectorNames))
+	copy(strs, _ConnectorNames)
+	return strs
+}
+
+// IsAConnector returns "true" if the value is listed in the enum definition. "false" otherwise
+func (i Connector) IsAConnector() bool {
+	for _, v := range _ConnectorValues {
+		if i == v {
+			return true
+		}
+	}
+	return false
+}
+
+// MarshalText implements the encoding.TextMarshaler interface for Connector
+func (i Connector) MarshalText() ([]byte, error) {
+	return []byte(i.String()), nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface for Connector
+func (i *Connector) UnmarshalText(text []byte) error {
+	var err error
+	*i, err = ConnectorString(string(text))
+	return err
+}