refactor(programs): Consolidate Merkle trees into one PDA (#444)

Maintaining multiple PDAs requires more effort and we need to switch
all types of Merkle trees at the same time anyway. We also need to
make sure that the sizes of the Merkle trees are consistent. Keeping
them in one PDA will make it easier.

Other changes:

* Merkle tree parameters
  * height: 22
  * roots: 2800

Author: vadorovsky

Cargo.lock

@@ -17,7 +17,7 @@ component main {
 		publicTransactionHash
 	]
 } = PrivateProgramTransaction(
-	18,
+	22,
 	4,
 	4,
 	184598798020101492503359154328231866914977581098629757339001774613643340069,

circuit-lib/circuit-lib.circom/src/transaction/privateProgramTransaction4In4OutMain.circom

@@ -14,7 +14,7 @@ component main {
 		publicMintPublicKey
 	]
 } = PrivateTransaction(
-	18,
+	22,
 	10,
 	2,
 	184598798020101492503359154328231866914977581098629757339001774613643340069,

circuit-lib/circuit-lib.circom/src/transaction/privateTransaction10In2OutMain.circom

@@ -15,7 +15,7 @@ component main {
 		publicMintPublicKey
 	]
 } = PrivateTransaction(
-	18,
+	22,
 	2,
 	2,
 	184598798020101492503359154328231866914977581098629757339001774613643340069,

circuit-lib/circuit-lib.circom/src/transaction/privateTransaction2In2OutMain.circom

@@ -16,7 +16,7 @@ component main {
 		publicNewAddress
 	]
 } = PublicProgramTransaction(
-	18,
+	22,
 	2,
 	2,
 	184598798020101492503359154328231866914977581098629757339001774613643340069,

circuit-lib/circuit-lib.circom/src/transaction/publicProgramTransaction2In2OutMain.circom

@@ -10,7 +10,7 @@ component main {
 		publicDataHash
 	]
 } = PublicTransaction(
-	18,
+	22,
 	8,
 	2,
 	184598798020101492503359154328231866914977581098629757339001774613643340069,

circuit-lib/circuit-lib.circom/src/transaction/publicTransaction10In2OutMain.circom

@@ -1,14 +1,14 @@
 {
   "pubkey": "5EMc8sCbHeb1HtRFifcbCiXN66kX6Wddrd61EkdJun6Y",
   "account": {
-    "lamports": 1350240,
+    "lamports": 1294560,
     "data": [
-      "xtvTnP1myPUCY+L7WEJcIRnY07lwy9TuaZBIebD9aqhznpq8Pv+mUQEAAAAAAAAAAQAAAAAAAAACAAAAAAAAAAAA",
+      "xtvTnP1myPUCY+L7WEJcIRnY07lwy9TuaZBIebD9aqhznpq8Pv+mUQEAAAAAAAAAAgAAAAAAAAAAAA==",
       "base64"
     ],
     "owner": "JA5cjkRJ1euVi9xLWsCJVzsRzEkT8vcC4rqw9sVAo5d6",
     "executable": false,
     "rentEpoch": 18446744073709551615,
-    "space": 66
+    "space": 58
   }
 }