feat(hpu): Add support for centered modswitch.

Add new field in HpuPBSParameters (log2_pfail and modulus_switch_type).
Also add new parameters set definition in shortint for benchmark matching.

Remove the used of use_mean_compensation register, this information is now embedded inside the parameters set definition.
Update psi64.hpu archive with newest bitstream

mockups/tfhe-hpu-mockup/params/gaussian_44b.toml

@@ -11,6 +11,8 @@
     message_width= 2
     carry_width= 2
     ciphertext_width= 44
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch="WmmUnfoldPcg"

mockups/tfhe-hpu-mockup/params/gaussian_44b_fast.toml

@@ -11,6 +11,8 @@
     message_width=2
     carry_width=2
     ciphertext_width=44
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch="WmmCompactPcg"

mockups/tfhe-hpu-mockup/params/gaussian_64b.toml

@@ -11,6 +11,8 @@
     message_width= 2
     carry_width= 2
     ciphertext_width= 64
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch= {GF64=[5,5]}

mockups/tfhe-hpu-mockup/params/gaussian_64b_fast.toml

@@ -11,6 +11,8 @@
     message_width=2
     carry_width=2
     ciphertext_width=64
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch= {GF64=[5,5]}

mockups/tfhe-hpu-mockup/params/gaussian_64b_pfail64.toml

@@ -11,6 +11,8 @@
     message_width= 2
     carry_width= 2
     ciphertext_width= 64
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch= {GF64=[5,6]}

mockups/tfhe-hpu-mockup/params/gaussian_64b_pfail64_psi64.toml

@@ -12,6 +12,8 @@
     carry_width= 2
     ciphertext_width= 64
     opportunistic=true
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch= {GF64=[5,6]}

mockups/tfhe-hpu-mockup/params/tuniform_64b_fast.toml

@@ -11,6 +11,8 @@
     message_width=2
     carry_width=2
     ciphertext_width=64
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch= {GF64=[5,6]}

mockups/tfhe-hpu-mockup/params/tuniform_64b_pfail128_psi64.toml

@@ -12,6 +12,8 @@
     carry_width= 2
     ciphertext_width= 64
     opportunistic=true
+    log2_p_fail=-128
+    modulus_switch_type= "CenteredMeanNoiseReduction"
 
 [ntt_params]
     core_arch= {GF64=[5,6]}

mockups/tfhe-hpu-mockup/params/tuniform_64b_pfail64_psi64.toml

@@ -12,6 +12,8 @@
     carry_width= 2
     ciphertext_width= 64
     opportunistic=true
+    log2_p_fail=-64 
+    modulus_switch_type= "Standard"
 
 [ntt_params]
     core_arch= {GF64=[5,6]}