[#85] apemanager: Generate protobufs for ape package

* Regenerate protobufs as APE specific type are defined
  as separate package;
* Move `ape` package related utils methods from `apemanager`.

Signed-off-by: Airat Arifullin <a.arifullin@yadro.com>

ape/test/generate.go

@@ -0,0 +1,71 @@
+package test
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/ape"
+)
+
+func GenerateRawChains(empty bool, n int) []*ape.Chain {
+	if empty {
+		return []*ape.Chain{}
+	}
+
+	res := make([]*ape.Chain, n)
+	for i := range res {
+		res[i] = GenerateRawChain(empty)
+	}
+	return res
+}
+
+func GenerateRawChain(empty bool) *ape.Chain {
+	chRaw := new(ape.ChainRaw)
+
+	if empty {
+		chRaw.SetRaw([]byte("{}"))
+	} else {
+		chRaw.SetRaw([]byte(`{
+			"ID": "",
+			"Rules": [
+			  {
+				"Status": "Allow",
+				"Actions": {
+				  "Inverted": false,
+				  "Names": [
+					"GetObject"
+				  ]
+				},
+				"Resources": {
+				  "Inverted": false,
+				  "Names": [
+					"native:object/*"
+				  ]
+				},
+				"Any": false,
+				"Condition": [
+				  {
+					"Op": "StringEquals",
+					"Object": "Resource",
+					"Key": "Department",
+					"Value": "HR"
+				  }
+				]
+			  }
+			],
+			"MatchType": "DenyPriority"
+			}`))
+	}
+
+	ch := new(ape.Chain)
+	ch.SetKind(chRaw)
+	return ch
+}
+
+func GenerateChainTarget(empty bool) *ape.ChainTarget {
+	m := new(ape.ChainTarget)
+
+	if !empty {
+		m.SetTargetType(ape.TargetTypeContainer)
+		m.SetName("BzQw5HH3feoxFDD5tCT87Y1726qzgLfxEE7wgtoRzB3R")
+	}
+
+	return m
+}